西安交通大学915-2018-编程3

#include <iostream>
using namespace std;


bool IsLeapYear(int x) {
    return ((x % 400 == 0) || (x % 4 == 0 && x % 100 != 0));
}

int month[2][13] = {
    {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
    {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};

struct Date {
    int year;
    int month;
    int day;
};

int CountDay(Date* date) {
    int cnt = 0;
    for (int i = 1; i < date->month; i++) {
        cnt += month[IsLeapYear(date->year)][i];
    }
    cnt += date->day;
    return cnt;
}

int main() {
    cout << "please input date(year month day):" << endl;
    Date date;
    cin >> date.year >> date.month >> date.day;
    int ans = CountDay(&date);
    cout << "the " << ans << "'th day in the year" << endl;
    return 0;
}